Innovative plastic materials target EVs

March 27, 2019 //By Christoph Hammerschmidt
Innovative plastic materials target EVs
With new resin-based products, Polyplastics Co, Ltd. (Tokyo) intends to offer a superior alternative to metals in electric vehicles (EVs). The company has developed the materials Duranex RBT and Durafide PPS for motor peripherals such as Power Control Units (PCUs). These innovative materials are characterized by high insulation capability and low water absorption, while withstanding harsh operating conditions.

Polyplastics' Duranex ® PBT CG7030 offers lower water absorption and high tracking resistance (Comparative Tracking Index, CTI: 600V) for high voltage parts such as PCUs. The material ensures high reliability for high-voltage parts that do not have a sufficient creepage distance. Because water and salt can penetrate high-voltage parts and cause tracking difficulties, materials with high CTI values are required.

In addition, Polyplastics supplies Durafide ® PPS 6150T73, a material with high shock resistance, high dimensional stability and excellent heat and chemical resistance for electric vehicle applications cast with metal inserts. In the case of increased formability (flowability), previous material technologies have been affected by lower heat shock resistance.

Polyplastics is also researching innovative materials to replace metals in PCU housings. The use of thermoplastics would enable lower weight and increased productivity, but other key requirements include strength, dimensional stability, electromagnetic shielding and thermal conductivity. Polyplastics is currently focusing on the development of materials capable of electromagnetic shielding. In addition, the company is targeting other EV applications such as motors and batteries with its material developments.

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